Nothing Special   »   [go: up one dir, main page]

EP1275342A3 - Apparatus and method for determining cardiac output in a living subject - Google Patents

Apparatus and method for determining cardiac output in a living subject Download PDF

Info

Publication number
EP1275342A3
EP1275342A3 EP02254832A EP02254832A EP1275342A3 EP 1275342 A3 EP1275342 A3 EP 1275342A3 EP 02254832 A EP02254832 A EP 02254832A EP 02254832 A EP02254832 A EP 02254832A EP 1275342 A3 EP1275342 A3 EP 1275342A3
Authority
EP
European Patent Office
Prior art keywords
cardiac output
living subject
subject
module
determining cardiac
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02254832A
Other languages
German (de)
French (fr)
Other versions
EP1275342A2 (en
EP1275342B1 (en
Inventor
Dennis G. c/o Cardio Dynamics Int. Corp. Hepp
Gail D. c/o Cardio Dynamics Int. Corp. Baura
James O. c/o Cardio Dynamics Int. Corp. Elf
Jeremy R. Cardio Dynamics Int. Corp. Malecha
Sau K. Cardio Dynamics Int. Corp. Ng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CardioDynamics International Corp
Original Assignee
CardioDynamics International Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CardioDynamics International Corp filed Critical CardioDynamics International Corp
Publication of EP1275342A2 publication Critical patent/EP1275342A2/en
Publication of EP1275342A3 publication Critical patent/EP1275342A3/en
Application granted granted Critical
Publication of EP1275342B1 publication Critical patent/EP1275342B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/026—Measuring blood flow
    • A61B5/0295—Measuring blood flow using plethysmography, i.e. measuring the variations in the volume of a body part as modified by the circulation of blood therethrough, e.g. impedance plethysmography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/02028—Determining haemodynamic parameters not otherwise provided for, e.g. cardiac contractility or left ventricular ejection fraction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/026—Measuring blood flow
    • A61B5/029—Measuring or recording blood output from the heart, e.g. minute volume
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0535—Impedance plethysmography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/271—Arrangements of electrodes with cords, cables or leads, e.g. single leads or patient cord assemblies
    • A61B5/273—Connection of cords, cables or leads to electrodes
    • A61B5/274—Connection of cords, cables or leads to electrodes using snap or button fasteners
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6843—Monitoring or controlling sensor contact pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A61B5/282—Holders for multiple electrodes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7253—Details of waveform analysis characterised by using transforms
    • A61B5/726—Details of waveform analysis characterised by using transforms using Wavelet transforms

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Hematology (AREA)
  • Physiology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

An improved apparatus and method for determining the cardiac output of a living subject. The improved apparatus generally comprises one or more electrode assemblies or patches affixed to the skin of the subject in the vicinity of the thoracic cavity. In one embodiment, the apparatus comprises a constant current source impedance cardiography (ICG) monitor adapted as a stand-alone system. In another embodiment, the apparatus comprises a module adapted for use with a host monitoring system, the latter providing ECG, blood pressure, and/or other inputs to the module. Method of detecting a loss of electrical continuity in one or more of the terminals of the electrode patch, and selecting between a plurality of signal inputs based on signal quality, are also disclosed.
EP02254832.5A 2001-07-10 2002-07-10 Apparatus for determining cardiac output in a living subject Expired - Lifetime EP1275342B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/903,473 US6602201B1 (en) 2000-07-10 2001-07-10 Apparatus and method for determining cardiac output in a living subject
US903473 2001-07-10

Publications (3)

Publication Number Publication Date
EP1275342A2 EP1275342A2 (en) 2003-01-15
EP1275342A3 true EP1275342A3 (en) 2004-04-14
EP1275342B1 EP1275342B1 (en) 2013-06-19

Family

ID=25417562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02254832.5A Expired - Lifetime EP1275342B1 (en) 2001-07-10 2002-07-10 Apparatus for determining cardiac output in a living subject

Country Status (2)

Country Link
US (1) US6602201B1 (en)
EP (1) EP1275342B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7979115B2 (en) 2005-05-18 2011-07-12 Cardiac Pacemakers, Inc. Detection of pleural effusion using transthoracic impedance

Families Citing this family (113)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ113799A0 (en) 1999-06-22 1999-07-15 University Of Queensland, The A method and device for measuring lymphoedema
US6907288B2 (en) * 2001-04-10 2005-06-14 Cardiac Pacemakers, Inc. Cardiac rhythm management system adjusting rate response factor for treating hypotension
US6912420B2 (en) * 2001-04-10 2005-06-28 Cardiac Pacemakers, Inc. Cardiac rhythm management system for hypotension
US7933642B2 (en) * 2001-07-17 2011-04-26 Rud Istvan Wireless ECG system
US7191000B2 (en) * 2001-07-31 2007-03-13 Cardiac Pacemakers, Inc. Cardiac rhythm management system for edema
US7047076B1 (en) 2001-08-03 2006-05-16 Cardiac Pacemakers, Inc. Inverted-F antenna configuration for an implantable medical device
US20050101875A1 (en) * 2001-10-04 2005-05-12 Right Corporation Non-invasive body composition monitor, system and method
US7628760B2 (en) * 2007-02-28 2009-12-08 Semler Scientific, Inc. Circulation monitoring system and method
US7100011B2 (en) * 2002-03-01 2006-08-29 Arris International, Inc. Method and system for reducing storage requirements for program code in a communication device
AU2002951925A0 (en) * 2002-10-09 2002-10-24 Queensland University Of Technology An Impedence Cardiography Device
US20040092801A1 (en) * 2002-11-13 2004-05-13 Budimir Drakulic System for, and method of, acquiring physiological signals of a patient
US7043293B1 (en) 2002-12-24 2006-05-09 Cardiodynamics International Corporation Method and apparatus for waveform assessment
US20040243192A1 (en) * 2003-06-02 2004-12-02 Hepp Dennis G. Physiologic stimulator tuning apparatus and method
US7455643B1 (en) 2003-07-07 2008-11-25 Nellcor Puritan Bennett Ireland Continuous non-invasive blood pressure measurement apparatus and methods providing automatic recalibration
US20050192837A1 (en) * 2004-02-27 2005-09-01 Cardiac Pacemakers, Inc. Systems and methods for uploading and distributing medical data sets
US20050192843A1 (en) * 2004-02-27 2005-09-01 Cardiac Pacemakers, Inc. Systems and methods for validating patient and medical devices information
US20050192649A1 (en) * 2004-02-27 2005-09-01 Cardiac Pacemakers, Inc. Systems and methods for providing variable medical information
US7751894B1 (en) 2004-03-04 2010-07-06 Cardiac Pacemakers, Inc. Systems and methods for indicating aberrant behavior detected by an implanted medical device
US7806830B2 (en) * 2004-06-16 2010-10-05 Cordeus, Inc. Apparatus and method for determination of stroke volume using the brachial artery
US7261697B2 (en) * 2004-06-16 2007-08-28 Bernstein Donald P Apparatus for determination of stroke volume using the brachial artery
US8068906B2 (en) 2004-06-21 2011-11-29 Aorora Technologies Pty Ltd Cardiac monitoring system
US20060004295A1 (en) * 2004-06-29 2006-01-05 Randolph Prydekker Electrode connectivity determination system
US7387610B2 (en) 2004-08-19 2008-06-17 Cardiac Pacemakers, Inc. Thoracic impedance detection with blood resistivity compensation
US20060111641A1 (en) * 2004-11-19 2006-05-25 Applied Cardiac Systems, Inc. System and method for ICG recording and analysis
US7570989B2 (en) * 2004-11-22 2009-08-04 Cardiodynamics International Corporation Method and apparatus for signal assessment including event rejection
US7270580B2 (en) * 2004-11-22 2007-09-18 Cardio Dynamics International Corporation Methods and apparatus for conducting electrical current
US7395109B2 (en) 2004-12-09 2008-07-01 Signalife, Inc. System for, and method of, monitoring heartbeats of a patient
US7299083B2 (en) 2004-12-09 2007-11-20 Signalife, Inc. Electrode for, and method of, indicating signal characteristics at particular positions in a patient's body
US7856261B2 (en) * 2004-12-13 2010-12-21 Koninklijke Philips Electronics N.V. Cable with spacer for positioning multiple medical sensors
JP4981688B2 (en) * 2005-01-31 2012-07-25 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Multiconductor connection device for medical sensors
GB2458389B (en) * 2005-04-14 2010-03-24 Justin Pisani Wearable physiological monitoring device
AU2006235722A1 (en) * 2005-04-14 2006-10-19 Hidalgo Limited Apparatus and system for monitoring
US7630763B2 (en) * 2005-04-20 2009-12-08 Cardiac Pacemakers, Inc. Thoracic or intracardiac impedance detection with automatic vector selection
US7603170B2 (en) * 2005-04-26 2009-10-13 Cardiac Pacemakers, Inc. Calibration of impedance monitoring of respiratory volumes using thoracic D.C. impedance
US7907997B2 (en) 2005-05-11 2011-03-15 Cardiac Pacemakers, Inc. Enhancements to the detection of pulmonary edema when using transthoracic impedance
US9089275B2 (en) * 2005-05-11 2015-07-28 Cardiac Pacemakers, Inc. Sensitivity and specificity of pulmonary edema detection when using transthoracic impedance
EP1903938A4 (en) * 2005-07-01 2010-01-20 Impedance Cardiology Systems I Pulmonary monitoring system
AU2006265761B2 (en) 2005-07-01 2011-08-11 Impedimed Limited Monitoring system
WO2007002993A1 (en) 2005-07-01 2007-01-11 Impedimed Limited Monitoring system
JP2009501578A (en) * 2005-07-20 2009-01-22 インピーダンス・カーディオロジー・システムズ・インコーポレイテッド Indicator determination
US9839781B2 (en) 2005-08-22 2017-12-12 Cardiac Pacemakers, Inc. Intracardiac impedance and its applications
WO2007041783A1 (en) 2005-10-11 2007-04-19 Impedance Cardiology Systems, Inc. Hydration status monitoring
US20070167864A1 (en) * 2005-11-29 2007-07-19 Lopez George A Cardiac output measurement devices and methods
KR20070066417A (en) * 2005-12-22 2007-06-27 삼성전자주식회사 Portable device for measuring electrocardiogram
WO2007137333A1 (en) 2006-05-30 2007-12-06 The University Of Queensland Impedance measurements
US7569020B2 (en) * 2006-06-19 2009-08-04 St. Jude Medical Ab Method for extracting timing parameters using a cardio-mechanical sensor
JP5372768B2 (en) 2006-11-30 2013-12-18 インぺディメッド リミテッド measuring device
US8290577B2 (en) * 2007-03-23 2012-10-16 Brooks Donald J Methods and apparatus for enhanced fiducial point determination and non-invasive hemodynamic parameter determination
US10307074B2 (en) 2007-04-20 2019-06-04 Impedimed Limited Monitoring system and probe
US20090318778A1 (en) * 2007-04-30 2009-12-24 Clifford Dacso Non-invasive monitoring of physiological measurements in a distributed health care environment
WO2008133897A1 (en) 2007-04-30 2008-11-06 Dacso Clifford C Non-invasive monitoring of physiological measurements in a distributed health care environment
JP5542050B2 (en) 2007-08-09 2014-07-09 インぺディメッド リミテッド Impedance measurement method and apparatus
US8116841B2 (en) 2007-09-14 2012-02-14 Corventis, Inc. Adherent device with multiple physiological sensors
WO2009036327A1 (en) 2007-09-14 2009-03-19 Corventis, Inc. Adherent device for respiratory monitoring and sleep disordered breathing
US8374688B2 (en) 2007-09-14 2013-02-12 Corventis, Inc. System and methods for wireless body fluid monitoring
EP2194858B1 (en) 2007-09-14 2017-11-22 Corventis, Inc. Medical device automatic start-up upon contact to patient tissue
WO2009036333A1 (en) 2007-09-14 2009-03-19 Corventis, Inc. Dynamic pairing of patients to data collection gateways
EP3922171A1 (en) 2007-09-14 2021-12-15 Medtronic Monitoring, Inc. Adherent cardiac monitor with advanced sensing capabilities
WO2009036256A1 (en) 2007-09-14 2009-03-19 Corventis, Inc. Injectable physiological monitoring system
JP5405500B2 (en) 2008-03-12 2014-02-05 コーヴェンティス，インク． Predicting cardiac decompensation based on cardiac rhythm
WO2009146214A1 (en) 2008-04-18 2009-12-03 Corventis, Inc. Method and apparatus to measure bioelectric impedance of patient tissue
US8660799B2 (en) 2008-06-30 2014-02-25 Nellcor Puritan Bennett Ireland Processing and detecting baseline changes in signals
US8398556B2 (en) 2008-06-30 2013-03-19 Covidien Lp Systems and methods for non-invasive continuous blood pressure determination
US8506498B2 (en) 2008-07-15 2013-08-13 Nellcor Puritan Bennett Ireland Systems and methods using induced perturbation to determine physiological parameters
US7950971B2 (en) * 2008-08-08 2011-05-31 Cardiodynamics International Corporation Electrical connector apparatus and methods
US20150201858A1 (en) * 2008-08-15 2015-07-23 Global Cardiac Monitors, Inc. Diagnostic device for remote sensing and transmitting biophysiological signals
US8532751B2 (en) 2008-09-30 2013-09-10 Covidien Lp Laser self-mixing sensors for biological sensing
US9687161B2 (en) 2008-09-30 2017-06-27 Nellcor Puritan Bennett Ireland Systems and methods for maintaining blood pressure monitor calibration
US9314168B2 (en) 2008-09-30 2016-04-19 Nellcor Puritan Bennett Ireland Detecting sleep events using localized blood pressure changes
US9301697B2 (en) 2008-09-30 2016-04-05 Nellcor Puritan Bennett Ireland Systems and methods for recalibrating a non-invasive blood pressure monitor
US9615766B2 (en) 2008-11-28 2017-04-11 Impedimed Limited Impedance measurement process
JP5326654B2 (en) * 2009-02-26 2013-10-30 オムロンヘルスケア株式会社 Voltage-frequency conversion circuit and blood pressure measurement device including the same
US8216136B2 (en) 2009-03-05 2012-07-10 Nellcor Puritan Bennett Llc Systems and methods for monitoring heart rate and blood pressure correlation
US20100324404A1 (en) * 2009-06-22 2010-12-23 Analogic Corporation Icg/ecg monitoring apparatus
US8290730B2 (en) 2009-06-30 2012-10-16 Nellcor Puritan Bennett Ireland Systems and methods for assessing measurements in physiological monitoring devices
US9198582B2 (en) 2009-06-30 2015-12-01 Nellcor Puritan Bennett Ireland Determining a characteristic physiological parameter
US8628477B2 (en) 2009-07-31 2014-01-14 Nellcor Puritan Bennett Ireland Systems and methods for non-invasive determination of blood pressure
EP2467059B1 (en) 2009-08-21 2019-11-06 Beth Israel Deaconess Medical Center, Inc. A hand-held device for electrical impedance myography
US9220440B2 (en) 2009-09-21 2015-12-29 Nellcor Puritan Bennett Ireland Determining a characteristic respiration rate
US9066660B2 (en) 2009-09-29 2015-06-30 Nellcor Puritan Bennett Ireland Systems and methods for high-pass filtering a photoplethysmograph signal
US8463347B2 (en) 2009-09-30 2013-06-11 Nellcor Puritan Bennett Ireland Systems and methods for normalizing a plethysmograph signal for improved feature analysis
WO2011050283A2 (en) 2009-10-22 2011-04-28 Corventis, Inc. Remote detection and monitoring of functional chronotropic incompetence
AU2010312305B2 (en) 2009-10-26 2014-01-16 Impedimed Limited Fluid level indicator determination
CA2778770A1 (en) 2009-11-18 2011-05-26 Chung Shing Fan Signal distribution for patient-electrode measurements
US9451897B2 (en) 2009-12-14 2016-09-27 Medtronic Monitoring, Inc. Body adherent patch with electronics for physiologic monitoring
US9451887B2 (en) 2010-03-31 2016-09-27 Nellcor Puritan Bennett Ireland Systems and methods for measuring electromechanical delay of the heart
US8965498B2 (en) 2010-04-05 2015-02-24 Corventis, Inc. Method and apparatus for personalized physiologic parameters
US8898037B2 (en) 2010-04-28 2014-11-25 Nellcor Puritan Bennett Ireland Systems and methods for signal monitoring using Lissajous figures
US8456295B2 (en) 2010-05-26 2013-06-04 General Electric Company Alarm generation method for patient monitoring, physiological monitoring apparatus and computer program product for a physiological monitoring apparatus
US8825428B2 (en) 2010-11-30 2014-09-02 Neilcor Puritan Bennett Ireland Methods and systems for recalibrating a blood pressure monitor with memory
US9259160B2 (en) 2010-12-01 2016-02-16 Nellcor Puritan Bennett Ireland Systems and methods for determining when to measure a physiological parameter
US9357934B2 (en) 2010-12-01 2016-06-07 Nellcor Puritan Bennett Ireland Systems and methods for physiological event marking
US8665096B2 (en) 2010-12-21 2014-03-04 General Electric Company Alarm control method, physiological monitoring apparatus, and computer program product for a physiological monitoring apparatus
GB201101858D0 (en) * 2011-02-03 2011-03-23 Isansys Lifecare Ltd Health monitoring
US9060695B2 (en) 2011-11-30 2015-06-23 Covidien Lp Systems and methods for determining differential pulse transit time from the phase difference of two analog plethysmographs
US8700121B2 (en) 2011-12-14 2014-04-15 Intersection Medical, Inc. Devices for determining the relative spatial change in subsurface resistivities across frequencies in tissue
US8755873B2 (en) 2012-09-21 2014-06-17 Welch Allyn, Inc. Evaluation of the quality of electrode contact with a skin surface
CN103083011B (en) * 2013-01-22 2014-11-05 西安交通大学 Electrocardio R wave crest real-time locating method assisted by chest impedance second order difference image
AT514017B1 (en) * 2013-02-22 2020-11-15 Dr Skrabal Falko Hemodynamic EKG
US9211110B2 (en) 2013-03-15 2015-12-15 The Regents Of The University Of Michigan Lung ventillation measurements using ultrasound
KR102164705B1 (en) * 2013-06-17 2020-10-12 삼성전자주식회사 Method and device to measure bio signal using connectable capacitive coupling active electrode
WO2015003015A2 (en) * 2013-07-01 2015-01-08 Intersection Medical, Inc. Compact and wearable apparatuses for home use in determining tissue wetness
DE102013011141A1 (en) * 2013-07-03 2015-01-08 Dräger Medical GmbH Measuring device for measuring a body function and method for operating such a measuring device
ES2537351B1 (en) * 2013-11-04 2015-12-03 Universidad De Sevilla Intelligent bioimpedance sensor for biomedical applications
CN105916442B (en) * 2014-01-17 2021-06-04 皇家飞利浦有限公司 Collecting and processing reliable ECG signals and gating pulses in a magnetic resonance environment
US10149628B2 (en) * 2014-05-20 2018-12-11 Samsung Electronics Co., Ltd. Signal processing method and apparatus
KR102455629B1 (en) * 2014-12-29 2022-10-17 삼성전자주식회사 Apparatus and method for processing bio-signal
EP3316775B1 (en) 2015-06-30 2019-11-20 Sunstar Suisse SA Disposable adhesive substrate adapted to be arranged on a medical device
US20190133516A1 (en) * 2016-06-06 2019-05-09 Tosense, Inc. Physiological monitor for monitoring patients undergoing hemodialysis
WO2018055228A1 (en) * 2016-09-20 2018-03-29 Nokia Technologies Oy Method and apparatus for synchronizing impedance cardiography with electrocardiography to lower patient auxillary current
US20220031564A1 (en) * 2020-08-03 2022-02-03 Hill-Rom Services, Inc. Therapeutic technique using electrical impedance spectroscopy
EP4111972A1 (en) * 2021-06-30 2023-01-04 Wojskowa Akademia Techniczna Electrode segment and electrode matrix for electrocardiographic and/or bioimpedance measurements
CN116098601B (en) * 2023-02-09 2023-09-19 山东埃尔法智慧医疗科技有限公司 Verification method and equipment for noninvasive cardiac output parameters

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577639A (en) * 1984-11-08 1986-03-25 Spacelabs, Inc. Apparatus and method for automatic lead selection in electrocardiography
US5103828A (en) * 1988-07-14 1992-04-14 Bomed Medical Manufacturing, Ltd. System for therapeutic management of hemodynamic state of patient
US5178154A (en) * 1990-09-18 1993-01-12 Sorba Medical Systems, Inc. Impedance cardiograph and method of operation utilizing peak aligned ensemble averaging
US5505209A (en) * 1994-07-07 1996-04-09 Reining International, Ltd. Impedance cardiograph apparatus and method
EP0776631A1 (en) * 1995-11-29 1997-06-04 Hewlett-Packard Company Method and apparatus for classifying heartbeats in an ECG waveform
WO1998053737A1 (en) * 1997-05-30 1998-12-03 N.I. Medical Ltd. Method and system for non-invasive determination of the main cardiorespiratory parameters of the human body
WO2000062664A1 (en) * 1999-04-15 2000-10-26 Nexan Limited Portable remote patient telemonitoring system
US6217525B1 (en) * 1998-04-30 2001-04-17 Medtronic Physio-Control Manufacturing Corp. Reduced lead set device and method for detecting acute cardiac ischemic conditions

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30101E (en) 1964-08-19 1979-09-25 Regents Of The University Of Minnesota Impedance plethysmograph
US5178151A (en) 1988-04-20 1993-01-12 Sackner Marvin A System for non-invasive detection of changes of cardiac volumes and aortic pulses
EP0354251B1 (en) 1988-08-06 1991-12-27 Hewlett-Packard GmbH Method and system for exchanging data between a master processor and a multiplicity of slave processors
US5511553A (en) 1989-02-15 1996-04-30 Segalowitz; Jacob Device-system and method for monitoring multiple physiological parameters (MMPP) continuously and simultaneously
US5184620A (en) 1991-12-26 1993-02-09 Marquette Electronics, Inc. Method of using a multiple electrode pad assembly
US5590648A (en) 1992-11-30 1997-01-07 Tremont Medical Personal health care system
US5713367A (en) * 1994-01-26 1998-02-03 Cambridge Heart, Inc. Measuring and assessing cardiac electrical stability
US6016445A (en) * 1996-04-16 2000-01-18 Cardiotronics Method and apparatus for electrode and transthoracic impedance estimation
US6141575A (en) 1996-08-16 2000-10-31 Price; Michael A. Electrode assemblies
US5876351A (en) 1997-04-10 1999-03-02 Mitchell Rohde Portable modular diagnostic medical device
US5895298A (en) 1997-05-29 1999-04-20 Biofield Corp. DC biopotential electrode connector and connector condition sensor
US6223831B1 (en) 1998-10-28 2001-05-01 Flexi-Coil Ltd. Differential connecting rod and draft cable for agricultural tillage device
US6186955B1 (en) 1998-11-16 2001-02-13 Gail D. Baura Noninvasive continuous cardiac output monitor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577639A (en) * 1984-11-08 1986-03-25 Spacelabs, Inc. Apparatus and method for automatic lead selection in electrocardiography
US5103828A (en) * 1988-07-14 1992-04-14 Bomed Medical Manufacturing, Ltd. System for therapeutic management of hemodynamic state of patient
US5178154A (en) * 1990-09-18 1993-01-12 Sorba Medical Systems, Inc. Impedance cardiograph and method of operation utilizing peak aligned ensemble averaging
US5505209A (en) * 1994-07-07 1996-04-09 Reining International, Ltd. Impedance cardiograph apparatus and method
EP0776631A1 (en) * 1995-11-29 1997-06-04 Hewlett-Packard Company Method and apparatus for classifying heartbeats in an ECG waveform
WO1998053737A1 (en) * 1997-05-30 1998-12-03 N.I. Medical Ltd. Method and system for non-invasive determination of the main cardiorespiratory parameters of the human body
US6217525B1 (en) * 1998-04-30 2001-04-17 Medtronic Physio-Control Manufacturing Corp. Reduced lead set device and method for detecting acute cardiac ischemic conditions
WO2000062664A1 (en) * 1999-04-15 2000-10-26 Nexan Limited Portable remote patient telemonitoring system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7979115B2 (en) 2005-05-18 2011-07-12 Cardiac Pacemakers, Inc. Detection of pleural effusion using transthoracic impedance

Also Published As

Publication number Publication date
EP1275342A2 (en) 2003-01-15
EP1275342B1 (en) 2013-06-19
US6602201B1 (en) 2003-08-05

Similar Documents

Publication Publication Date Title
EP1275342A3 (en) Apparatus and method for determining cardiac output in a living subject
CA2375249A1 (en) A method and device for measuring tissue oedema
US5307818A (en) Wireless electrocardiographic and monitoring system and wireless electrode assemblies for same
CA2544952C (en) Device for monitoring hypoglycaemic condition
US9173581B2 (en) Apparatus and method for the automated measurement of sural nerve conduction velocity and amplitude
US7340294B2 (en) Impedance measurement apparatus for assessment of biomedical electrode interface quality
AU659111B2 (en) A device for measurement of electrical impedance of organic and biological materials
US5634468A (en) Sensor patch and system for physiological monitoring
GB0306629D0 (en) Monitoring electrical muscular activity
JP4867364B2 (en) Bioelectric information measuring device
DE60119835D1 (en) ELECTRODE FOR MEASURING WEAK BIOELECTRIC SIGNALS
WO2004004539A3 (en) Apparatus for monitoring chf patients using bio-impedance technique
WO1994001039A9 (en) Wireless electrocardiographic system and wireless electrode assemblies
EP1250944A3 (en) Portable patient monitor with defibrillator/pacemaker interface and battery power management
CA2411589A1 (en) Method and apparatus for displaying information obtained by electrical impedance tomography data
BR0011025A (en) Method, device and catheter for determining in vivo properties of blood such as its viscosity
ATE382292T1 (en) APPARATUS AND METHOD FOR DETERMINING ESTIMATES OF HEARTBEAT VOLUME AND CARDIAC OUTPUT
WO1989002247A1 (en) Cardiac probe enabling use of a personal computer
EP1174080A3 (en) Impedance spectroscopy system and cathether for ischemic mucosal damage monitoring in hollow viscous organs
EP1221299A3 (en) Method and apparatus for generating a twelve-lead ecg from fewer than ten electrodes
CN107088067B (en) Biological tissue recognition device, recognition system and recognition method
US20080255625A1 (en) System and Method for Providing Event Summary Information Using an Encoded Ecg Waveform
CN1426287A (en) Portable ECG signaling device
JPH11113868A (en) Electrocardiogram monitor, patient monitor having electrocardiogram module and electrocardiogram waveform detecting method
WO2014035040A1 (en) Multi-channel impedance measuring method and multi-channel impedance measuring instrument

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Ipc: 7A 61B 5/00 A

Ipc: 7A 61B 5/05 B

Ipc: 7A 61B 5/029 B

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIC1 Information provided on ipc code assigned before grant

Ipc: 7A 61B 5/0424 B

Ipc: 7A 61B 5/053 B

Ipc: 7A 61B 5/029 A

Ipc: 7A 61B 5/00 B

Ipc: 7A 61B 5/0452 B

17P Request for examination filed

Effective date: 20041012

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

17Q First examination report despatched

Effective date: 20070402

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BAURA, GAIL D., C/O CARDIO DYNAMICS INT. CORP.

Inventor name: HEPP, DENNIS G., C/O CARDIO DYNAMICS INT. CORP.

Inventor name: MALECHA, JEREMY R., C/O CARDIO DYNAMICS INT. CORP.

Inventor name: NG, SAU KUEN, C/O CARDIO DYNAMICS INT. CORP.

Inventor name: ELF, JAMES O., C/O CARDIO DYNAMICS INT. CORP.

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 617191

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130715

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 60245111

Country of ref document: DE

Effective date: 20130814

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130920

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130930

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 617191

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130919

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20130619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130531

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131021

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130619

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140331

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130731

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130731

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

26N No opposition filed

Effective date: 20140320

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130819

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60245111

Country of ref document: DE

Effective date: 20140320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130919

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130710

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 60245111

Country of ref document: DE

Representative=s name: DREISS PATENTANWAELTE PARTG MBB, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 60245111

Country of ref document: DE

Representative=s name: DREISS PATENTANWAELTE PARTG MBB, DE

Effective date: 20150223

Ref country code: DE

Ref legal event code: R081

Ref document number: 60245111

Country of ref document: DE

Owner name: FUJIFILM SONOSITE, INC., BOTHELL, US

Free format text: FORMER OWNER: CARDIODYNAMICS INTERNATIONAL CORP., SAN DIEGO, CALIF., US

Effective date: 20150223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130710

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20210616

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 60245111

Country of ref document: DE